Dietary supplementation with a source of omega-3 fatty acids increases sperm number and the duration of ejaculation in boars

Estienne, M. J.; Harper, Allen F.; Crawford, Russell J.

doi:10.1016/j.theriogenology.2008.02.007

Cited by 80 publications

(61 citation statements)

References 14 publications

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“…Experiments carried out by other scientists demonstrated that the intake of n-3 fatty acids was beneficial to male reproductive capacity, resulting in histological and ultra-structural changes in the testis and sperm, better spermatogonial development, a larger number of germ cell layers (5), an increased total number of sperm per ejaculation, greater sperm quality, density and motility, as well as an increased membrane integrity of sperm in humans and animals (4,18,22,23,25,28), which may be related to changes in hormone metabolism (16 …”

Section: Resultsmentioning

confidence: 99%

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Vaškas¹,

Šiukščius²,

Razmaitė³

et al. 2017

Medycyna Weterynaryjna

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Many researchers have pointed out that the intake of omega-3 and -6 fatty acids is beneficial to animal health and reproductive capacity, but the effect of fatty acids on the histomorphology of ram testes is still unknown. The aim of this study was to investigate the effect of linseed oil containing polyunsaturated fatty acids on the morphology and histomorphometric characteristics of ram testis and epididymis. Testes of 12 Lithuanian local coarse wool rams were investigated histomorphologically and histomorphometrically in the present work. The rams were divided into two groups, an experimental group and a control group following, the principle of analogues – the same origin, age, weight, and condition score. The experimental group (n = 6) received 2% linseed oil sediments while the control group (n = 6) received 1.2% sunflower oil for 9 months. The diameter of testicular tubules and the height of the germinal epithelium, the spermatogenic index and the number of Leydig cells were higher in the experimental group than those in the control group. In addition, the number of degenerated tubules was not significantly lower in the group that received 2% linseed oil sediments. Still, the height of the epididymal epithelium was lower than that in the control group....

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Section: Resultsmentioning

confidence: 99%

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Vaškas¹,

Šiukščius²,

Razmaitė³

et al. 2017

Medycyna Weterynaryjna

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“…In contrast, in pigs that received supplementation, there was an increase in sperm concentration starting in the 8th week of treatment, which was explained by the time required to complete spermatogenesis until sperm maturation in this species (ESTIENNE et al, 2008). In addition, in rabbits fed a diet containing canola oil, which is rich in omega-3, an increased sperm concentration, higher semen volume and increased total sperm quantity were all reported (ANDREAZZI et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Effect of dietary supplementation with omega-3 and -6 on fresh and frozen/thawed sperm quality of dogs

Rodrigues

Ruiz

Nardo

et al. 2017

SCA

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For years, fatty acids have been recommended as a dietary supplement to improve canine hair. For animal reproduction, supplementation with omegas has been used to increase the reproductive efficiency and conception rate, but few studies have been conducted in dogs. The aim of this study was to evaluate the effects of daily dietary supplementation with omega-3 and -6 on the quality of fresh and frozen/ thawed semen in canines. Semen was collected from seven dogs and evaluated for sperm motility, vigor, concentration, and morphology. The 17-week study included 119 ejaculates and was divided according to oral supplementation with omega-3 and -6: M1 (1 st -5 th week) or pre-supplementation; M2 (6 th -9 th week) and M3 (10 th -13 th week) or during supplementation; and M4 (14 th -17 th week) or postsupplementation. After analysis, the semen was frozen and then revaluated both immediately and 30 minutes (at 37° C) after thawing. Supplementation with omegas increased sperm motility, vigor, and concentration; however, supplementation had no influence on semen freezability. In addition, there was no improvement in sperm motility after supplementation when the thawed cells were maintained at 37° C for 30 minutes. We concluded that dietary supplementation with omega-3 and -6 for 4 to 8 weeks can improve the quality of fresh semen, although it has no effect on the freezability of canine semen. Key words: Canine. Diet-supplemented. Polyunsaturated-fatty-acid. Sperm. ResumoOs ácidos graxos têm sido recomendados há anos como suplemento dietético para a melhora do pelo canino. Na área de reprodução animal, a suplementação com ômega tem sido usada para aumentar a eficiência reprodutiva e a taxa de concepção em muitas espécies, mas poucos estudos foram conduzidos em cães. Então, o objetivo deste estudo foi avaliar os efeitos da suplementação dietética diária com ômega-3 e -6 sobre a qualidade do sêmen fresco e congelado de cães. de 7 cães e avaliados quanto a motilidade espermática, vigor, concentração e morfologia. O estudo foi dividido de acordo com os períodos de suplementação oral com omegas-3 e -6, no qual M1 (1ª-5ª semana) foi considerado o período pré-suplementação, M2 (6ª-9ª semana) e M3 (10ª-13ª semana) período de suplementação e M4 (14ª-17ª semana) pós-suplementação, totalizando 17 semanas de estudo (119 ejaculados). Após a análise, o sêmen foi congelado e reavaliado imediatamente e 30 minutos após a descongelação (mantidas a 37º C). A suplementação resultou em aumento da motilidade espermática, vigor e concentração do sêmen fresco; no entanto, não houve influência na congelabilidade do sêmen. Além disso, não houve aumento da motilidade dos espermatozoides após a suplementação, quando as células descongeladas foram mantidas a 37° C, durante 30 minutos. Concluiu-se que a suplementação dietética com omegas-3 e -6, durante 4 a 8 semanas melhora os parâmetros do sêmen fresco de cães, embora não há nenhum efeito sobre a qualidade espermática após a congelação. Palavras-chave: Ácido-graxo-poli-insaturado. Canino. ...

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“…Therefore, it can be hypothesized that the amount of HDL produced by an N. vitripennis male depends on the availability of the limited resource linoleic acid and therefore might be costly. Taking into account that polyunsaturated fatty acids may influence both the fertility and the number of sperm (Wathes et al 2007;Estienne et al 2008), and also that sperm production is costly (Dewsbury 1982), a trade-off might be predicted in N. vitripennis between sperm production, pheromone production and pheromone release. Disadvantaged males might produce more pheromone at the cost of transferable sperm, or release higher pheromone doses at the cost of scent-marking frequency, in order to increase the chance of attracting mates at all.…”

Section: Discussionmentioning

confidence: 99%

Quantity matters: male sex pheromone signals mate quality in the parasitic wasp Nasonia vitripennis

et al. 2009

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Sexual selection theory asserts that females are well adapted to sense signals indicating the quality of potential mates. One crucial male quality parameter is functional fertility (i.e. the success of ejaculates in fertilizing eggs). The phenotype-linked fertility hypothesis (PLFH) predicts that functional fertility of males is reflected by phenotypic traits that influence female mate choice. Here, we show for Nasonia vitripennis, a parasitic wasp with haplodiploid sex determination and female-biased sex ratios, that females use olfactory cues to discriminate against sperm-limited males. We found sperm limitation in newly emerged and multiply mated males (seven or more previous matings) as indicated by a higher proportion of sons in the offspring fathered by these males. Sperm limitation correlated with clearly reduced pheromone titres. In behavioural bioassays, females oriented towards higher doses of the synthetic pheromone and were attracted more often to scent marks of males with a full sperm load than to those of spermlimited males. Our data support the PLFH and suggest that N. vitripennis females are able to decrease the risk of getting constrained to produce suboptimal offspring sex ratios by orienting towards gradients of the male sex pheromone.

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Dietary supplementation with a source of omega-3 fatty acids increases sperm number and the duration of ejaculation in boars

Cited by 80 publications

References 14 publications

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Effect of dietary supplementation with omega-3 and -6 on fresh and frozen/thawed sperm quality of dogs

Quantity matters: male sex pheromone signals mate quality in the parasitic wasp Nasonia vitripennis

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